A nonagon has nine sides.
The term ‘nonagon’ originates from the Latin words ‘nonus,’ meaning nine, and ‘gon,’ meaning sides. Therefore, when we talk about a nonagon, we are referring to a polygon that has exactly nine edges and nine vertices. Nonagons can be found in various areas of design and architecture, and they can be regular (with all sides and angles equal) or irregular (with sides and angles that are not equal). Understanding the properties of different polygons like the nonagon is fundamental in geometry.